/**
* Emits code boxing value of basic type.
*
* @param mv output method visitor
* @param type input data type (must be basic type!)
*/
public void emitAutoboxing(SpyMethodVisitor mv, Type type) {
switch (type.getSort()) {
case Type.INT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Integer", "valueOf", "(I)Ljava/lang/Integer;");
break;
case Type.LONG:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Long", "valueOf", "(J)Ljava/lang/Long;");
break;
case Type.FLOAT:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Float", "valueOf", "(F)Ljava/lang/Float;");
break;
case Type.DOUBLE:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Double", "valueOf", "(D)Ljava/lang/Double;");
break;
case Type.SHORT:
mv.visitInsn(I2S);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Short", "valueOf", "(S)Ljava/lang/Short;");
break;
case Type.BYTE:
mv.visitInsn(I2B);
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Byte", "valueOf", "(B)Ljava/lang/Byte;");
break;
case Type.BOOLEAN:
mv.visitMethodInsn(INVOKESTATIC, "java/lang/Boolean", "valueOf", "(Z)Ljava/lang/Boolean;");
break;
case Type.CHAR:
mv.visitMethodInsn(
INVOKESTATIC, "java/lang/Character", "valueOf", "(C)Ljava/lang/Character;");
break;
}
}
/**
* Fetches return value or thrown exception. If return value is of basic type, it is automatically
* boxed.
*
* @param mv output method visitor
* @param type return data type
* @return number of JVM stack slots emitted code consumes
*/
public int emitFetchRetVal(SpyMethodVisitor mv, Type type) {
if (Type.VOID == type.getSort()) {
mv.visitInsn(ACONST_NULL);
return 1;
}
mv.visitInsn(DUP);
emitAutoboxing(mv, type);
mv.visitVarInsn(ASTORE, mv.getRetValProbeSlot());
return type.getSize();
}